CN202381683U

CN202381683U - Spring energy storage self-tightening seal ring

Info

Publication number: CN202381683U
Application number: CN2011204981770U
Authority: CN
Inventors: 方存正; 刘德银; 王英才; 李伏虎
Original assignee: SHANGHAI YILIN PETROLEUM MACHINERY MANUFACTURE CO Ltd
Current assignee: Fangzheng valve group Shanghai Co.,Ltd.
Priority date: 2011-12-02
Filing date: 2011-12-02
Publication date: 2012-08-15
Anticipated expiration: 2021-12-02

Abstract

The utility model relates to a spring energy storage self-tightening seal ring. The spring energy storage self-tightening seal ring comprises a seal body, a U-shaped ring groove arranged at the middle in the seal body, a spring ring of a U-shaped ring, which is placed on the U-shaped ring groove, and a protecting ring, which is mounted on the outer side of the spring ring of the U-shaped ring. The spring energy storage self-tightening seal ring disclosed by the utility model has the benefits that, as a spring of the U-shaped ring is increased, along with the fluctuations of working pressure, the stress state of the spring can be increased along with the increase in the working pressure and be reduced along with the reduction in the working pressure, a hemispherical seal ring and a fitting piece on the upper surface and the lower surface of the seal ring can be always in close fit and the sealing performance can be further ensured.

Description

Spring energy-storage self-tightening sealing circle

Technical field

The utility model relates to a kind of seal ring, relates in particular to the structure of sealing circle.

Background technique

The squared circle that mainly contains O type rubber ring and graphite series of present edge face sealing member.

O type rubber ring is owing to receive the performance impact of material, receives certain restriction at aspects such as temperature, corrosion-resistant, bearing pressures, can not satisfy the needs of the gentle bad working environments such as corrosion-resistant of high pressure, height.And the sealing of the squared circle of graphite series mainly is its distortion realization sealing of outer power extruding; Especially externally extruding force is changed (reducing) under the influence of the fatigue of double-screw bolt, the factors such as rising of temperature by vibration, and the possibility that leakage takes place is then arranged; Bring certain hidden danger to safety in production; If external compression power is excessive, the frictional force of seal bar is increased, increased the torque of seal bar.

Summary of the invention

The utility model technical issues that need to address have provided a kind of spring energy-storage self-tightening sealing circle, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is realized through following technological scheme:

The utility model comprises: seal; Be provided with a U-loop groove in the interior centre of described seal; On described U-loop groove, settle the spring ring of U-loop; Guard circle is installed in the spring ring outside at said U-loop.

Compared with prior art; The beneficial effect of the utility model is: owing to increased the spring of U-loop; Along with the fluctuation of working pressure, the stress of spring increases with the rising of working pressure, reduces with the reduction of working pressure; But hemisphere seal ring and counterpart on the top and bottom of seal ring are fitted tightly, guaranteed sealability.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the partial enlarged drawing of Fig. 1.

Fig. 3 is the fundamental diagram that adopts the utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Visible by Fig. 1, Fig. 2: the utility model comprises: seal 1; Be provided with a U-loop groove in the interior centre of described seal 1; On described U-loop groove, settle the spring ring 2 of U-loop; Guard circle 3 is installed in spring ring 2 outsides at said U-loop.

On the above and below of described seal 1, also be designed with hemisphere seal ring 11.

The material of described seal 1 is that the material of poly ether ether ketone plastic (PEEK) and guard circle 3 is polytetrafluoroethylplastic plastic (PTFE).

The utility model forms 3 by seal 1, spring ring 2, guard circle.Seal circle 1 is formed by the PEEK material, and there is a U-loop groove centre, is provided with flange in the annular groove, on the top and bottom (A place, B place) of seal 1, is designed with hemisphere seal ring 11.Spring ring 2 strikes out U-loop by the erosion-resisting alloy slice of high-performance, is installed in the U-loop groove of seal 1, and U-loop spring ring 2 is fixed on the inward flange of seal.Guard circle 3 with the PTFE material is installed in the U-loop of spring ring 2.

Visible by Fig. 3: when the utility model is installed in the end face seal groove, axially have certain magnitude of interference, making spring ring 2 be in pressured state, the top hemisphere seal ring and the loam cake 5 of seal 1 fit tightly, A place among the figure; The top hemisphere seal ring and the lower body 4 of seal 1 fit tightly, B place among the figure, thus set up the condition of low pressure seal.

Rising along with working medium pressure; Medium gets in the U-loop groove of seal 1; The U-loop groove is swollen at axial dimension; Force top (the A place) of seal ring closely to fit tightly more with following (B place) hemisphere seal ring, thereby realize high pressure sealing, spring ring 2 receives interior pressure condition by be converted into by outer pressure condition simultaneously.Fluctuation along with working pressure; The stress of spring ring 2 increases with the rising of working pressure, reduces with the reduction of working pressure, but hemisphere seal ring and counterpart on the top and bottom of seal 1 are fitted tightly; Guarantee sealability, realized self-tightening sealing.Also avoided making material aging, reduced the working life of Sealing owing to Sealing receives outside huge extruding all the time.

In order to prevent that the excessive pressurized of spring ring from making its forfeiture elasticity, in the U-loop of spring ring, is equipped with the guard circle with the PTFE material.

In order to overcome the deficiency of rubber material in the gentle bad working environments such as corrosion-resistant of high pressure, height, this practical PEEK material of having selected function admirable for use.The bad working environments of high pressure resistant to satisfy, high temperature resistant, low temperature resistant, acid-alkali-corrosive-resisting.

In order to guarantee the superior function of spring ring, improve the corrosion resistance and the volume that reduces Sealing, the high performance erosion-resisting alloy manufacturing of the spring ring material selection of the utility model of seal ring.

Claims

1. a spring energy-storage self-tightening sealing circle comprises: seal; It is characterized in that: be provided with a U-loop groove in the interior centre of described seal; On described U-loop groove, settle the spring ring of U-loop; Guard circle is installed in the spring ring outside at said U-loop.

2. spring energy-storage self-tightening sealing circle according to claim 1 is characterized in that: on the above and below of described seal, also be designed with the hemisphere seal ring.

3. spring energy-storage self-tightening sealing circle according to claim 1 and 2 is characterized in that: the material of described seal is that the material of poly ether ether ketone plastic and guard circle is a polytetrafluoroethylplastic plastic.